Humminbird Matrix 12 5-Inch Waterproof Fishfinder Full-featured fish finder, GPS ready with full screen trackplotter, 3D track and split screen and more 5-inch, high-definition 12-level grayscale FTSN display with 240 x 240 pixels of resolution 20-degree single beam sonar optimized for coverage and precision bottom detail Plug-and-play compatible with CannonLink, InterLink, WeatherSense and more Measures 7 x 7.25 x 4 inches (W x H x D), and reliable to 800 feet of depth